Iris throttle adaptor

Claim 1

In a carburetor having a liquid gasoline containing chamber, an air passageway, an atomizing venturi in said air passageway and connected to the gasoline chamber for the induction of gasoline thereinto by the passage of inducted air through the passageway, the improvement comprising; a throttle structure for association with the air passageway to control the gasoline particles and air passing into the manifold of the internal combustion engine with which the carburetor is used, actuating linkage between the conventional carburetor actuating mechanism and said throttle structure, and said throttle structure including means to effect additional atomization of the gasoline and further breaking up of the suspended gasoline particles as already atomized by the carburetor venturi, the throttle structure is mounted in place of the conventional throttle disk structure, and the throttle structure includes a flat main support plate having at least three apertures therein, a single flat slidably movable throttle plate with apertures therethrough, and means on the slidably movable throttle plate for actuation by the connection to the caburetor actuating mechanism, the means on the slidably movable throttle plate for actuation thereof includes a pivotal lever appropriately mounted on the first said plate by a replaceable pivot block mounted in one of said three apertures, said pivotal lever having a slot therein, and a pin connection between the slot and the throttle plate.